P2802 Fault Code

Transmission Range Sensor B Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2802 fault code indicates a malfunction in the Transmission Range Sensor B Circuit, specifically when the signal voltage is lower than expected. This sensor plays a critical role in determining the transmission gear, allowing the engine control module to adjust engine performance accordingly. When this fault occurs, it may lead to improper shifting or the transmission being stuck in a specific gear.

What are the symptoms of the P2802 code?

Drivers experiencing the P2802 code may notice:

• Ill-functioning transmission shifting, such as difficulty in moving between gears
• The transmission may go into 'limp mode' to protect itself, restricting performance
• Dashboard warnings such as check engine light or transmission warning light
• Unusual engine behavior, such as high RPMs without an increase in speed

What causes the P2802 code?

Possible causes of the P2802 code may include:

• A defective Transmission Range Sensor B
• Poor electrical connections or damaged wiring in the sensor circuit
• A malfunctioning engine control module (ECM)
• Transmission fluid leaks affecting sensor operation
• Corrosion or dirt affecting sensor contact points

How to fix P2802?

To resolve the P2802 fault code, consider the following steps:

• Inspect the wiring and connectors of the Transmission Range Sensor B for any signs of damage or corrosion
• Test the Transmission Range Sensor B using a multimeter for proper voltage and functionality
• Replace the sensor if found to be defective
• Clear the fault codes after repairs and take the vehicle for a test drive to confirm the fix
• If issues persist, further diagnosis of the engine control module or transmission may be necessary